Optimization of the Zr-loading on siliceous support catalysts leads to a suitable Lewis/Brønsted acid sites ratio to produce high yields to γ-valerolactone from furfural in one-pot

García, Adrián; Miguel, Pablo J. Sanz; Ventimiglia, Alessia; Dimitratos, Nikolaos; Solsona, Benjamín

doi:10.1016/j.fuel.2022.124549

Cited by 24 publications

(17 citation statements)

References 51 publications

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“…According to the IR-Py results, it is possible the presence of Brønsted acid sites in the Zr supported on the sepiolite catalysts, regardless of the absence of BAS in the sepiolite and in the pure ZrO 2 . BAS may have been generated by the interaction of the OH-groups of fresh sepiolite (before calcination) with the LAS of the Zr sites, as reported previously with other supports [51,63].…”

Section: Discussionsupporting

confidence: 58%

“…The synthesized catalysts have been tested in the transformation of furfural in the liquid phase. Firstly, the reaction was carried out with different supported catalysts, sepiolite and pure ZrO 2 , as it was done in a previous work [63]. Table 3 shows the catalytic results obtained, including the yields to the main reaction product (γ-valerolactone GVL) as well as some other products detected such as isopropyl levulinate (IPL), furfuryl alcohol (FAL), furfuryl ether (FE) and levulinic acid (LA).…”

Section: Catalytic Resultsmentioning

confidence: 99%

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Zr supported on non-acidic sepiolite for the efficient one-pot transformation of furfural into γ-valerolactone

García

Monti

Ventimiglia

et al. 2023

Biomass and Bioenergy

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Section: Discussionsupporting

confidence: 58%

Section: Catalytic Resultsmentioning

confidence: 99%

Zr supported on non-acidic sepiolite for the efficient one-pot transformation of furfural into γ-valerolactone

García

Monti

Ventimiglia

et al. 2023

Biomass and Bioenergy

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“…Many previous studies have shown that the FUR to GVL reaction was a cooperative LAS–BAS bifunctional catalytic mechanism. ,,,− ,,, However, the acidity data of the catalyst (obtained from NH 3 -TPD and Py-IR) were usually measured with fresh and dry catalysts. It is known that water is produced in the process of FAL to FE and consumed in the process of FE to IPL.…”

Section: Resultsmentioning

confidence: 99%

One-Pot Conversion of Furfural to Gamma-Valerolactone over Zr-SBA-15: Cooperation of Lewis and Brønsted Acidic Sites

Liu

Zhang

et al. 2023

ACS Appl. Nano Mater.

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A series of bifunctional Zr-SBA-15_x of varying molar Si/ Zr ratio x (15−730) with isolated Lewis and Brønsted acid sites were prepared by an in situ synthesis procedure and applied to the one-pot conversion of furfural (FUR) to gamma-valerolactone (GVL). These catalysts were detailed and characterized by XRF, XRD, N 2 physisorption, FTIR, SEM, TEM, NH 3 -TPD, and pyridine-DRIFT techniques. On all these Zr-SBA-15_x catalysts, the conversion of FUR was higher than 99%, while the GVL selectivity first increased and then decreased with decreasing x. A Zr-SBA-15_25 was identified as the best-performing catalyst, offering a 93.3% selectivity of GVL under optimized reaction conditions. The effects of reaction temperature, time, and solvent on catalytic performance were also investigated. Correlating the catalyst performance with the Brønsted acid site (BAS)/Lewis acid site (LAS) ratio uncovers that the balance between the LAS and the BAS would be the key to the higher catalytic performance. The possible reaction mechanism for the cascade conversion of FUR to GVL was proposed. Moreover, basic (lutidine and pyridine) additives were added, respectively, to the reaction solution to investigate their effects on catalytic performance, which provide a piece of evidence in support of the cooperative LAS−BAS bifunctional catalytic mechanism.

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“…The results could be attributed to the presence of double Bronsted and Lewis acidic sites, which play extremely important roles in cascade reactions. A study of the conversion of FF to GVL using Zr on silica spheres was carried out by García et al [64]. Silica spheres were prepared using triethanolamine and hexadecyltrimethylammonium bromide as guides and tetraethyl orthosilicate as silica source.…”

Section: γ-Valerolactonamentioning

confidence: 99%

Design of Heterogeneous Catalysts for the Conversion of Furfural to C5 Derivatives: A Brief Review

Viana¹,

Bonfim²,

Silva³

et al. 2022

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Technological development made in the field of biomass application allows synthesizing several high-value products, such as furfuraldehyde. Furfural, produced through sequential hydrolysis and dehydration reactions from biomass, is considered a platform molecule and a precursor of several other chemicals and biofuels that are generated following reactions such as hydrogenation, hydrodeoxygenation, and decarboxylation. This review aims to reveal the environmental-friendly mechanisms followed for producing furfural derivatives and the design of catalysts and supports. Redox and acid-base properties of the molecules have been discussed. The stability, the details of the surface area, and the applications of the molecules to reduce the bottlenecks faced in the industrial production of bioproducts have been explored.

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Optimization of the Zr-loading on siliceous support catalysts leads to a suitable Lewis/Brønsted acid sites ratio to produce high yields to γ-valerolactone from furfural in one-pot

Cited by 24 publications

References 51 publications

Zr supported on non-acidic sepiolite for the efficient one-pot transformation of furfural into γ-valerolactone

Zr supported on non-acidic sepiolite for the efficient one-pot transformation of furfural into γ-valerolactone

One-Pot Conversion of Furfural to Gamma-Valerolactone over Zr-SBA-15: Cooperation of Lewis and Brønsted Acidic Sites

Design of Heterogeneous Catalysts for the Conversion of Furfural to C5 Derivatives: A Brief Review

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